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Showing 1 to 7 of 7 for “"avoided crossings"”.
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Conical Intersections and Avoided Crossings of Electronic Energy Levels
… certain systems characterized by the crossing or avoided crossing of two electronic eigenvalues. First, an example problem will be investigated for a given Hamiltonian resulting in a codimension 1 crossing by implementing results by Hagedorn from 1994. Then we perturb the Hamiltonian to study the …
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Fourth order spectral theory and diffusion-driven instability
… half-plane exhibit a cascading pattern of barely-avoided crossings. We provide a complete description of the eigenfunctions and eigenvalues by implicitly parameterizing the eigenvalue curves. We also establish properties of the eigenvalue curves such as monotonicity, crossings, asymptotic growth, …
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"“Phonon"" and electron transport in glass-crystal dual materials"
… localized and delocalized modes, which induces avoided crossings and harmonic broadening in the dispersion. Allen/Feldman theory shows that the hybridization and avoided crossings are the dominant mechanisms of the reduction. Anharmonic scattering is also enhanced in the patterned …
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Dynamic Homogenization Of Linear Waves In Periodic Media And Origami-Inspired Structures
… topological configurations such as Dirac points, avoided crossings, and near-Dirac points. On setting the source term to zero, the featured system of equations degenerates to a low-order algebraic eigenvalue problem that accurately captures the local geometry of (a cluster of) dispersion surfaces. …
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Ultracold Molecular Structure and Collisions
… eigenstates at low magnetic fields and the avoided crossings caused by the nuclear-electric quadrupole interaction. Third, we use a rigorous coupled-channel method to examine quantum nuclear spin dynamics in cold collisions between 13 C 16 O molecules and He atoms. We found that the …
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The Electronic and Vibrational Spectroscopy of Metal Phthalocyanines and Metal Phthalocyanine Chlorides Isolated in Low Temperature Solids
… in them. The evolution diagrams may show avoided crossings of various extents, which thereby reflects the degree of the NH(D) motion in the modes. The reverse ISR effect is directly correlated to these avoided crossings.